There are various computational models for representing the parallel computers. In this part, we discuss various models. These models would give a platform for the designing as well as the analysis of the parallel algorithms.

Combinational Circuits

Combinational Circuit is one of the forms for parallel computers. In interconnection networks, many processors communicate with each other directly and do not need a shared memory in between. Mostly, combinational circuit (cc) is a connected arrangement of logic gates with a set of m input lines and a set of n output lines as given in Figure. The combinational circuits are mostly made up of various interconnected components arranged in the form called as stages as given in Figure.

                                                                          Combinational circuit

Detailed combinational circuit

It might be noted here that there is no feedback control employed in combinational circuits. There are a small number of terminologies followed in the context of combinational circuits such as fan in and fan out. Fan in indicates the number of input lines attached to each device and fan out indicates the number of output lines. In Figure , the fan in is 3 and fan out is also 3. The following parameters are used for analyzing a combinational circuit:

1)  Depth: It means that the total number of phases used in the combinational circuit starting from the input lines to the output lines. For example, in the depth are 4, as there are four different phases attached to a interconnection network. The other form of interpretation of depth can be that it represents the worst case time complexity of resolving a problem as input is given at the initial input lines and data is transmitted between various phases through the interconnection network and at the end reaches the output lines.

2) Width: It represents the total number of devices attached for a particular phase. For example in Figure, there are 4 components linked to the interconnection network. It means that the width is 4.

3)  Size: It represents the total count of devices used in the complete combinational circuit. For example, in Figure , the size of combinational circuit is 16 i.e. (width * depth).

Posted Date: 3/2/2013 6:31:57 AM | Location : United States

Ask an Expert

Related Discussions:- Different models of computation-parallel algorithms, Assignment Help, Ask Question on Different models of computation-parallel algorithms, Get Answer, Expert's Help, Different models of computation-parallel algorithms Discussions

Write discussion on Different models of computation-parallel algorithms
Your posts are moderated

Write your message here..

Related Questions

What is the syntax to add a banner to the cisco router, banner motd # banner motd #

Distinguish between network devices computers and servers, The School of Co... The School of Computing is planning to deploy a new network structure to accommodate the following scenario. Please make suggestions on how this LAN can be designed based on the fl

Telecommunication switching system, if the signal input to an amplifier is ... if the signal input to an amplifier is 0 dBm what is the power output in mW if the gain of the amplifier is 20 dB ?

Explain the OSI Model Facts, OSI Model Facts The OSI model classifies a... OSI Model Facts The OSI model classifies and organizes the methods that hosts perform to maintain data for transport across the network. You should be familiar with the OSI m

How is load balancing accomplish in igrp, How is load balancing acoomplish ... How is load balancing acoomplish in IGRP?

Physical layer responsibilities of osi model, Q. Physical Layer Responsibil... Q. Physical Layer Responsibilities of osi model? - Physical characteristics of interfaces as well as media - Representation of bits with no interpretation - Data rate is

What is horizontal and vertical parity, What is horizontal and vertical par... What is horizontal and vertical parity A single error can cause both horizontal and vertical parity checks to be wrong. Two errors can also be easily detected. If they are not

Ports, It is an additional 16-bit number which uniquely identifies the spec... It is an additional 16-bit number which uniquely identifies the specific service on any given machine on the Internet. Port numbers are 16 bit wide, so each of the computers on the

Enumerate about the virtual private network, Enumerate about the Virtual Pr... Enumerate about the Virtual Private Network (VPN) Even though, many firewalls also include the features of the virtual private network, the functionality and capabilities of V

Operating system - server and client, Operating System - Server and Client ... Operating System - Server and Client Various operating systems that support Intranets are all variants of Windows and Unix. In addition to these, certain other software releva